A total of six objects were observed with the Simultaneous-color Wide-field Infrared Multi-object Spectrograph [1]}, [2]}, [3]}, [4]} mounted on the Subaru Telescope in May 2021 (Program S21A-047, PI: M. Tamura). SWIMS was used in long-slit mode with its simultaneous zJ (\(700<R<1200\) ) and HK (600<R<1000) grisms. The 300 s individual exposures were acquired following a standard ABBA procedure to efficiently remove the sky emission.
The seeing was generally very good (between 03 and 06) but clouds were hindering the observations at times. A slit of 05 or 08 was used depending on the seeing. Table REF  gives the list of targets observed with SWIMS and the corresponding number of exposures and individual exposure times. Three B stars of the Upper Scorpius associations were observed (HIP81145, HIP82133 and HIP78702) to be used as telluric standards.
